Dana Underwood
Vice President
As a healthcare operations leader, Dana brings 10+ years of progressive experience in hospital administration with strong principles associated with strategic planning, physician practice operations, and healthcare information systems. Dana has strong leadership skills and an extensive knowledge in developing services, both professional and ancillary, as well as start-up operations of new practices and offices. She recently served as Director of Operations with Optum, part of UnitedHealth Group for the Denver market. She also served as Senior Administrator for Women’s Health with MedStar Health at MedStar Georgetown University Hospital in Washington, DC, Business Manager with Centura Health at St. Anthony Hospital in Lakewood, CO and Program Coordinator at Denver Health in Denver, CO.
Dana earned her Bachelor of Arts degree in English Studies from Old Dominion University in Norfolk, VA and her MBA in Health Administration from the University of Colorado, Denver.
Outside of work, Dana enjoys spending time with her family, hiking in the mountains, arts/crafts, catching up on Netflix shows, and traveling.
Crista Keller, MD
Chief Medical Officer
Dr. Crista Keller is an internal medicine physician with a clinical focus in geriatric medicine. She has practiced with Aspen Medical Group at Rose Medical Center in Denver, Colorado since 2006. Early in her career, she developed an interest in process improvement related to organizational, operational, and financial aspects of medicine. In 2018, she created a mentoring program for primary care providers in HCA, focusing on these “non-medical” aspects of healthcare. Through mentoring, educational seminars, and leadership roles in HCA, she serves as an advocate for primary care and works to improve communication between clinicians and administrators.
In 2024, Dr Keller joined Colorado Care Partners as Chief Medical Officer, where she collaborates with primary care providers to support the implementation of value-based care models. She provides education regarding coding and clinical process improvement to help providers succeed in current financial models of healthcare. Dr Keller also works with corporate leadership to advocate for primary care and support meaningful interventions to improve care delivery.
Dr. Keller is deeply committed to improving healthcare through education and process improvement. Her goal is to help healthcare providers optimize their time and energy so they can focus on delivering high-quality patient care while maintaining their personal well-being.
Macklin Nickles
Director of Population Health
Macklin Nickles interest in value-based care started while completing his Master of Health Administration from the University of Memphis. As an administrative resident at Baptist Memorial Healthcare in Memphis, Tennessee he focused on contracting and financial analysis in a fully capitated model. Prior to joining Colorado Care Partners, he managed a dual primary care and urgent care office in Castle Pines, Colorado, and then joined HCA Healthcare supervising business office staff for three multi-specialty surgery centers in the greater Denver area.
Originally from Arkansas, being outdoors has always been a major part of Macklin’s life. He enjoys camping, spending days in Denver’s great parks and snowboarding in the winter. He also volunteers for Downtown Denver’s Business Improvement District – the Urban Forest Initiative.
Cindy Chumacas
Director of Business Development
Cindy serves as Director of Business Development for Colorado Care Partners (CCP), where she supports the organization's strategic growth through business development, marketing, and community outreach. She collaborates closely with physician practices, providers, members, and payors to build and sustain strong partnerships, identify growth opportunities, and advance initiatives that strengthen network performance and support CCP's mission. Cindy is recognized for her collaborative approach and commitment to fostering meaningful relationships that drive long-term success.